Trailer and power unit for soil pulverizers



F 1 1 1,618900 I e}, 927 H. A. FRETTS 4 TRAILER AND POWER UNIT FOR SOIL PULVERIZERS Filed s p 8, i I Sheets-Sheet 1 INVENTOR H ENRY A. FRETTS.

1927. H. A. FRETTS TRAILER AND POWER UNIT FOR SOIL PULVERIZERS Feb. 15

Filed Sept. 8, 1925 2 Sheets-sheaf 2 INVENTOR 'HEN'RY/MF'RETTS.

v Patented Feb. 15, 1927.

Z1'I-1ENR'YJA. ran'r'rs, or sa'cnnivinnro, camronma,

' TRAILERAND rownnunrr roe-sort runvnaiznnslj vA lic tionsled September a, 19525. fseriain 5 4=,-865.

This invention relates to tractor-trailer power-units jfor rotary soil pulverizers and 7 comprises, in a general way, a means for cover the trailer proper and the arrange ment as bornefthe-reby 'of'the several co-re- .lated =mechanisms constituting the rotary.

pulverizer mountings, the driving 11168115,

' means of adjustment .for regulating the cutting depth ofthe helicoidal blades carried by the rotor and constituting the rotarypulveri zer, and runners as aids in passingover yielding"surfaces.

"In ,pract'ce Fit 7 better arrangement to attach the trailer thus equipped directly to the tractor, rather than tohave the tractor carry this element as an much more flexible combination, 1 as well as one (permitting the detachment ofthe tractorand its application to'diverse uses-in l 1 other directions.

The principal "object of my inventionis the provision of a two, or more, wheeled traileradapted for attachment to a tractor,

i an

or the like, and bearing a -rota-ry soil-pul- Verizer, together with a power-unit fadapt- .ed for the operation of said rotary ,pulverizer.

A'gfurther objectis the provisionpin a de-' 7 vice of the character .describechof a trailer adapted (tor the convenientmounting of a 'meansjitor the regulationolf the depth of v nit.of the .rotor borne blades, or cutters, as

wheels so positioned within the cuttingline of the rotary pulverizer that said Wheels 'will' at all times be supported upon the firmer earth. r 4

Other objects and advantages will appear as thisspecification progresses and be more clearly. set forth in-the claims hereto appended.

In the accompanying drawings, forming a part ofthis. specification, and in which has been found 'to. be the? similar characters of reference parts, throughout,

.refe'r' to like Figure -1 a 'top plan view of atr-ailjer embodyingthe principles of my invention,

in which. a four wheel construction is'shown in run "lines, the .dot-and-dash lines iindicating the shape of the forward end i of the trailer whenthefront wheels are removed? Figure Qfis a side elevation, showingfthe trailer frame, .pulverizer mounting and adjusting means therefor, and the power unit I for driving the pulverizer;

. Figure 8 is -a.deta1l;view of the rear end of the trailer frame, showing one of the frames bearing the cross-head gu de ways and runner;

"Figure 4 is a horizontal vsectional detail taken through vone otthe pulverizer .iguide frames and cross=head bearings for. the pu'lverizer :shaltt, and indicated on :line .414: of Figure 2.; and integral unit, as there is thus provided 'a the depth er cut of the pulverizer, the sec-i tion being taken on line '55 o fFFigure 1. 1

comprises a rectangular frame- 1oil-beam, or liken-construction having side members 2 and 3 and spacing braces 5, 6, 7 .S 'at the forward end. of the fra1ne. T he;frame The embodiment shown inflthe drawings 3 11 is. supported by means ofa pair of main supporting wheels .9 l and '10 -mounted upon axle 11 and connected to -.the under1,side rof the I-beam side members "by Ibearingsq1-2.

The forward end of the frame is preferably and ll adapted for connection to awtractor lmt w The\forward;1extremities-o*the side frames 2 and 3 maybe bent'npward lyi-and the rear frameof the tractor by means of a I king-pin, and the front tractor wheels removed, if desired' The extremities of the as means for the adjustable support of the .pulverizer 17 The guide-frames are preferably'forged or cast and compriseupward- 1y extending brackets 18 and oppositely disposed brackets 19 connected by means of reinforcing-ribs 20 and provided. with rec tangular openings 21 bearing marginal V I I I 7 supported by ei ofisteeringwheelsifi rotary soll-pulverizer and bearing adjusting .drawn;tog.ether, as shown rin dot and dash lines in =Eiguresli1 and 2, .a-nd -connected to ,I-beams 2 and 3 areprovided with oppositely disposed guide frames 15 and 16 serving flanges 22 V and 23, said openings adapted to receiveothe ends of the iheam' a ing-blocks 28,

side members 2 and 3 of the frame, towhich the flanges 22 and 23 are securely riveted.

Brackets24 are connected to the brackets" 19 by the bottom flanges25 and extend in parallelism therewith and are provided with ribs 26, the ribsand 26 ofthe brackets 18 and 24 respectively forming guide-ways 27 adapted to r'receive'vthe cross-head. bear-- "Runners 29 are securely ri'veted to' the under sides of the bottom flanges and normally rest slightly above the ground level, Figure 2, unless the wheelsfi) and 10 sink "into the ground, when they contact the nected by radius rods 32 to the main trailer shaft 11 and adapted for arcuate movementrelative to said shaft 11, the elongated slots 33 formed in the bearing-blocks permitting compensation for the movementof the shaft 31, when the rotor 17 is raised or lowered. A The cross-head bearing-blocks arepivotally connected at 34 tothe upstanding arms 35 bearing rack sections 36 at their upper ends adaptedto mesh with pin-ions 37 mount' ed upon shaft 38, which is borne by bearings 39 formed at'the npperends'of the brackets 18, the rack arms 35 being held incontact o witlrthe pinions 37 bymea'ns of'saddles 40 positioned to bear against the iedges of these arms, while allowing free vertical movement "thereof. 7 r

The mechanism for raising and lowering "the rotor comprises a hand-wheel 42 mounted at one slde' of .the machlne upon'the stubsh aft bearing a pinion 44 adapted to mesh withv a gear 45 mounted upon the outer end of' shaft 38,;so that the movement of the hand-Wheel inone direction causes the rack arm 35, carrying the rotor, to be raised, while movement thereof in the opposite direction causes the lowering of the rotor relative to the frame t r i The rotor, is driven, in the direction of t-ra vel, by means of a shaft 46 mounted in sprocket 52 by achain 54,

bearings 47 secured to the side members 2 and 3, and sprocket-wheels 48 connected to the-rotor sprocket-wheels 49 by sprocketchains 50; The shaft 46 is connected to the power unit 51 by means of azsprocket Wheel -52 mounted upon the crank-shaft thereof and a sprocket wheel 53 mounted upon said shaft 46 and connected with the power unit It is obvious that, as arranged, the rotor may be raised entirely clear of the ground for transportation of the trailer from one fieldto another through manipulation of the hand-wheel,

or through like manipulation, it may be ad' justed to take a cut of a depth to meetvaried f req irements. A V i As is shown'in Figure 1, the rotor is somewhat shorter than thewidth of the frame, and isprovided with aplurality of reversely arranged sets of helicoidal-shaped cutters 55,

such as'is described in mypreviously mentioned co-opending' application. The rear wheels 9 and 10 are set 1n somewhatfrom the ends of the rotor, so that they may at all times, as beforestated,'runon unplowed ground, thereby avoiding heavy tractor trailer and combination power unit for rotary soil pulverizers comprising,

in combination, va traiier-frame having a oojno' 2 w through yielding freshly V plowed grounds.

having thus described my invention, "I claim, and desire to secure by Letters Patmain axle, supporting wheelsmounted upon the axle, a power unit mounted upon said frame, guide-frames comprising .f brackets V disposed at the rear end of said trailer-frame and bearing upwardly"extending ribs forming vertical guideways, cross-head bearing blocks mounted for vertical movement in said guideways and having elongated openings'therein, a shaft mounted in said bearing-block openings, radius rods connecting said shaft with-the main axle, a rot'aryipularcuate movement relative to said axle, driving connections between said power unitaiid puiverizer shaft, and means for; ad usting I said pulverizer relative to "the ground; p in testimony Whereofl have. affixed my signature. 7

HENRY teams; 7

-verizer borne by said shaft and adaptedfor loo; 

